Page 45 - Riem-Vol6_nº2

216 IBRACON Structures and Materials Journal • 2013 • vol. 6 • nº 2
Numerical analysis of reinforced concrete beams strengthened with high strength cement-based
composite material
Figure 9 shows the load-deflection curves obtained experimentally
and numerically.
Figure 10 shows the comparison between the experimental and
the numerical values for concrete compressive strain (sample point
near node 77) and for maximum strengthening tensile strain (sam-
ple point near node 94).
4.2.3 Beam strengthened with three PBO-FRCM layers
According to Ombres [1], the beam strengthened with three
PBO-FRCM layers failed at a 71.39kN load due to the debond-
ing of the strengthening system from the concrete substrate.
The rupture load numerically obtained by finite element model
was 72.75kN, representing a difference of +1.90% relative to
the experimental value.
Figure 11 shows the load-deflection curves obtained experimen-
tally and numerically.
Figure 12 shows the comparison between the experimental and
the numerical values for concrete compressive strain (sample
point near node 77) and for maximum strengthening tensile strain
(sample point near node 94) as a function of applied load increase.
Figure 8 – Load versus Strain in the mid-span section
for Beam Serie S – One layer2
Figure 9 – Load-deflection curves (node 73 – Figure 4)
for Beam Serie S – Two layers2
Figure 10 – Load versus Strain in the mid-span
section for Beam Serie S – Two layers2
Figure 11 – Load-deflection curves (node 73 – Figure 4)
for Beam Serie S – Three layers2